张文福;杜娟;刘迎春;李琛;任亚文;

• 1:东北石油大学防灾减灾工程及防护工程省高校重点实验室

• 2:东北石油大学土木建筑工程学院

摘要(Abstract)：

索桁架组合体系与普通梁板结构不同,需要考虑索力增量,振动特性较为复杂.首先,采用Timoshenko梁的连续化模型模拟桁架梁,推导桁架梁的等代抗弯刚度;采用能量变分法,分析索桁架组合体系固有振动,给出索桁架组合体系竖向振动频率解析解;分析770m跨度索桁架组合体系、900m跨度索桁架组合体系和1 200m跨度索桁架组合体系,与有限元ANSYS分析结果对比,误差在10%以内.该方法公式较简单、精度较高,可为索桁架组合体系的工程设计提供参考.

关键词(KeyWords)：固有振动;能量变分法;索桁架组合体系;Timoshenko梁;有限元

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金项目(51178087);; 黑龙江省教育厅重点项目(12511z004)

作者(Author):张文福;杜娟;刘迎春;李琛;任亚文;

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